WKSystemPreviewView needs to implement some of UIScrollViewDelegate
<rdar://problem/38427622>
Created attachment 335716 [details] Patch
Comment on attachment 335716 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=335716&action=review > Source/WebKit/UIProcess/ios/WKSystemPreviewView.mm:166 > +// FIXME: This class, and WKWebContentProvider itself, shouldn't need to be a UIScrollViewDelegate. A bug number would be good here.
Committed r229583: <https://trac.webkit.org/changeset/229583>